Method for producing folds for holding the top or bottom pieces of card and paste board boxes in position.



No. 893,654. PATENTED JULY 21, 1908. T. REMUS.

METHOD FOR PRODUCING FOLDS FOR HOLDING THE TOP OR BOTTOM PIECES OF OARD AND PASTE BOARD BOXES IN POSITION. APPLICATION FILED JUNE 25,1907.

UNITED STATES PATENT oE roE.

TEODOR REMUS, OF DRESDEN, GERMANY.

METHOD FOR PRODUCING FOLDS FOR HOLDING THE TOP OR BOTTOM PIECES OF CARD AND PASTE BOARD BOXES IN POSITION.

Specification of Letters Patent.

Patented-Tuly 21, 1908.

Application filed June 25, 1907. Serial No. 380,764. v

ful Improvements in the Methods for Pro-' ducing Folds for Holding the Top or Bottom Pieces of Card and Paste Board Boxes in Position, of which the following is a specification.

- The usual known methods for manufac-- turing paste or card-board boxes whose top or bottom pieces, or both, are deposited in and held in position by a fold (as shown in Figure 1) overlappin the edge, are possessed of a serious defect w 'ch consists of minute, fine creases at the edge of the afore-mentioned parts. They are especially pronounced on light-colored card-boards and constitute a serious imperfection.

This invention effectively remedies this defect.

The new method is illustrated in the acmpanying drawings wherein Fig. 1, is a section of a com Fig. 2, is a section of a disk whic may constitute either the top or bottom of a box.

- Fig. 3, is a section of the disk when bowed to decrease'its diameter. a box body blank which constitutes the walls of the box or-of its cover. Fi 5, is a section of a mold with the box bo y blank and bowed disk inserted. Fig. 6, illustrates the flattening and consequent diametrical expansion of the disk .which effects the formation of a fold in the box body..

The flat disk a, has a diameter reater than that of the interior of the box body b, to an extent double the depth of the fold. By curving or bowl the d sk a, its diameter is decreased to sue extent that it coincides .vith the interior diameter of the box body. The height of the box body blank is sufficient to allow for the formation of the fold disk-a, a

leted box.

Fig. 4, is a section of and to give the desired heightto the finished box. The connection of the disk and the body is best effected with the aid of a scpecial mold d, which closely envelops the'bo y except where the fold is to be formed, and there it is enlar ed as shown. The core or block e, is of a iameter equal to fit the box body, and its upper face determines the elevation or height of the disk. When the body '1) has been de osited in the mold, the curved or convex dis with its convex surface turned upwards, is placed upon the core or block, and within the body, as shown in Fig. 5. By then pressing upon the bowed disk, by means of a stamp or die, it assumes its original fiat shape and regains its former diameter. During the pressing of the disk a, the body blank where touched by the disk, is forced outwards, and the disk forms a g poove' in which it. securelyrests, as shown in 'g. 6. By then forcibly pressing or squeezing the margins of this groove against the pletely formed. This fold extends around the edge of the disk and firmly unites the disk to the box body. The fold, thus produced, is caused by stretching the body, which obviates the possibility of the formation of creases, however fine or minute.

I claim:

The method for making card or pasteboard boxes whose top or bottom piece is held in osition by means of folds in the box b0 y, consisting in bowing a disk, thereby decreasing its diameter; then inserting the bowed dlSk within a body blank; then. flattening the bowed disk thereby forming a groove in the body blank; and finally presslng the margins of said groove to complete the fold in the box body around the edge of the disk.

TEODOR REMUS. Witnesses:

PAUL ARRAS, CLARE SIMAN.

fold, as shown in Fig. 1, is com- 

